Keystones — Lintel
Five GCSE retrieval questions · 6 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
35000000
Answer: 3.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 45°. Find opposite
Answer: 23cm -
4. Ratio Mixed ratio problems
In ratio 4:1:2, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
Calculate the mean of: 48, 29, 22, 45, 8, 41, 29, 47
Answer: 33.6